Seniors are already facing a familiar flood of Medicare Advantage ads, even as major insurers prepare to drop hundreds of plans for 2027. The pullback could force millions of beneficiaries to find new coverage.
That advertising blitz is arriving alongside a major shake-up: federal data cited by HEALTH CARE un-covered shows 732 Medicare Advantage plans, affecting just under 2.4 million people, will disappear in 2027, meaning many beneficiaries may have to switch coverage whether they expected to or not.
Here's what to know
The enrollment window opened Oct. 15 and closes Dec. 7, and some in the industry think the disruption could ultimately affect up to 5 million people.
The retrenchment spans some of the biggest names in the business. Humana said roughly 600,000 of its members will be affected by the 2027 pullback. Separately, an analysis of Centers for Medicare & Medicaid Services data found that UnitedHealthcare plans to shrink by 140 counties, Aetna by 123 counties while exiting Maryland and New Hampshire, and Centene by 344 counties.
A handful of for-profit companies dominate Medicare Advantage. UnitedHealthcare and Humana alone make up 46% of the market, and the Medicare Payment Advisory Commission estimates insurers will collect about $615 billion this year to run the plans.
At Humana, executives have labeled the strategy "margin recovery." For seniors, the practical effect could be a scramble to replace doctors, drug coverage, or both.
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More background
People whose plans remain available still may need to shop carefully. Insurers can revise a Medicare Advantage plan's premiums, copays, drug formulary, provider network, and out-of-pocket cap every year, and those changes show up in each plan's Annual Notice of Change.
Cost exposure can still be high. In 2027, some Advantage plans may have in-network out-of-pocket costs of up to $9,850, or $14,800 with out-of-network care. Prescription drugs don't count toward those caps, and about 1 in 10 Medicare Advantage enrollees were already in 2026 plans with the steepest allowed in-network limit.
Medicare Advantage insurers fielded nearly 53 million prior authorization requests in 2024, according to KFF, and denied 4.1 million of them, fully or partially. More than 80% of appealed denials were later reversed. The same KFF research found that Medicare Advantage plans had roughly half the doctors in their networks as traditional Medicare.
Medicare's updated Plan Finder can help narrow options, but it still omits key details, such as whether a provider's contract is ending soon or whether a doctor still has openings for new patients. The New York Times reported on a Virginia patient who had confirmed her periodontist accepted her plan, only to get a $1,906 bill once the provider left the network.
What can be done?
Beneficiaries whose plans are being discontinued should already have received a nonrenewal letter. If they take no action, their coverage defaults to traditional Medicare on Jan. 1, though anyone losing drug coverage through a Medicare Advantage plan must sign up separately for Part D.
Plan loss also opens a Medigap guaranteed-issue period. That window opens 60 days before the old plan's coverage ends and stays open for another 63 days afterward, and insurers can't turn someone away or raise the price based on health during that stretch.
HEALTH CARE un-covered suggests treating the Plan Finder as a starting point rather than a final answer, then calling doctors' offices and the insurer to confirm the specific 2027 plan still covers what it claims, and noting who provided each answer and when.
People can also get free help through their state's State Health Insurance Assistance Program, known as SHIP. The federally funded counseling network reaches roughly 4.3 million people each year through more than 2,200 local community groups, and its counselors draw no commissions or sales incentives from the plans they discuss.
KFF data show that about 20.9 million Medicare Advantage enrollees, or nearly three in four, have a health condition a Medigap insurer could use to deny coverage. That share jumps to 88% among enrollees 85 and older.
Where can I learn more?
Insurance pullbacks aren't limited to Medicare Advantage.
• In Santa Cruz County, homeowners wonder what to do after insurers drop coverage.
• In Boulder, residents watch wildfire risks drive up insurance premiums beyond their budgets.
• Across Louisiana, families are fed up paying high premiums as coverage shrinks.
• After California wildfires, homeowners said they were left with nothing but denied claims.
• In Idaho wildfire zones, residents got a letter saying that coverage was ending.
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